User Modeling and Problem-Space Representation in the Tutor Runtime Engine. - Steven Ritter 001; Stephen Blessing; Leslie Wheeler (User Modeling, 2003)

Scaffolds and Nudges: A Case Study in Learning Engineering Design Improvements. - Stephen E. Fancsali; Martina Pavelko; Josh Fisher; Leslie Wheeler; Steven Ritter 001 (AIED (2), 2021)